KISS POINT LEARNING METHOD FOR ENGINE CLUTCH OF HYBRID ELECTRIC VEHICLE

摘要

The present invention relates to a method to learn an engine clutch kiss point of a hybrid vehicle and, more specifically, to a method to learn an engine clutch kiss point of a hybrid vehicle, capable of accurately and quickly estimating and detecting a kiss point (torque delivery starting point), from which torque delivery starts in a dry engine clutch, without an extra learning event before the vehicle is driven. To this end, the method includes: a target torque control step of controlling a starter-generator, connected with an engine to delivery power, at target torque in a state in which an input shaft and an output shaft of an engine clutch are stopped in a vehicle key-on state, a state in which the engine clutch is completely combined, and an engine-off state; a step of separating the engine clutch in a target torque control state of the starter-generator; a step of sensing the rotation of the starter-generator while the engine clutch is being separated; and a step of determining a kiss point from engine clutch release displacement (Xr) when the starter-generator starts to rotate.